Mil-spec O-ring family, nitrile, improved-performance hydraulic
M83461/1 O-rings: nitrile to MIL-P-83461, now AMS-P-83461 and AS83461/1
M83461/1-XXX specifies a nitrile (NBR) O-ring for petroleum hydraulic fluid with improved performance over the MS28775 family, in the AS568 size the dash names; the governing MIL-P-83461 and its size sheet MIL-P-83461/1 were cancelled on 2003-10-01 and superseded by SAE-AMS-P-83461 (the material, issued 1998) and SAE-AS83461/1 (the drawing, current at revision C, revised in October 2016 and reaffirmed on 2021-11-08, titled M83461 O-ring molded from AMS-P-83461 rubber).
- Polymer
- Nitrile (NBR)petroleum hydraulic fluid
- Durometer
- 75as manufacturers supply it
- Current drawing
- SAE-AS83461/1Crevised 2016, reaffirmed 2021
- QPL
- None on recordMIL document cancelled
Specification: documents, status, material
| Item | Value | Source |
|---|---|---|
| MIL material document | MIL-P-83461: Canceled 2003-10-01 (inactivated 1997-12-31), superseded by SAE-AMS-P-83461 | DLA ASSIST ident 33813, read 2026-09-24 |
| MIL size sheet | MIL-P-83461/1: Canceled 2003-10-01, superseded by SAE-AMS-P-83461/1 | DLA ASSIST ident 33814, read 2026-09-24 |
| MIL boss size sheet | MIL-P-83461/2 (1991-01-30): Canceled 2003-10-01 (inactive for new design 1997-12-31), superseded by SAE-AMS-P-83461/2; DoD withdrew that adoption 2010-01-20 for SAE-AS83461/2 (Active, adopted 2010-01-20) | DLA ASSIST idents 71937, 213940 and 277054, read 2026-10-04 |
| SAE material document | SAE-AMS-P-83461: Issued 1998-04-01 | SAE Mobilus, read 2026-09-27 |
| Current drawing | SAE-AS83461/1, M83461 O-ring molded from AMS-P-83461 rubber: Reaffirmed; current AS83461/1C, revised October 2016, reaffirmed 2021-11-08 | SAE Mobilus, read 2026-09-27 |
| Base polymer | Nitrile (NBR) | document titles |
| Durometer | Manufacturers supply this family at 75 (Parker® ORD 5700 (2021) Table 8-4 lists its compound in the 70 to 80 band); confirm the durometer against your print | Parker ORD 5700 (2021) Table 8-4, read 2026-09-24 |
| Service temperature | The document title carries its own service temperature; we cite the document and quote no figure on this page | document title |
| Slash sheets | /1 = standard AS568 sizes (three-digit dash); /2 = boss sizes AS568-901 to -932 (three-digit dash, M83461/2-9YY) | DLA ASSIST MIL-P-83461/2 sheet, ident 71937, read 2026-10-04 (/2); Freudenberg Sealing Technologies, Aerospace Part and Material Cross-Reference (brochure, July 2024), page 4 (/1) |
| Boss variant | M83461/2-9YY, the AS568-9YY size (the sheet's form); Freudenberg also prints M83461/2-YY | DLA ASSIST MIL-P-83461/2 sheet, ident 71937, read 2026-10-04; Freudenberg Sealing Technologies, Aerospace Part and Material Cross-Reference (brochure, July 2024), https://www.fst.com/-/media/files/brochures/en/fst-aerospace-parts-cross-reference-brochure.pdf, page 4 |
| QPL | None on record for the cancelled MIL document; AMS-P-83461 not stated | DLA ASSIST ident 33813, read 2026-09-24; SAE Mobilus, read 2026-09-27 |
| Service | Petroleum hydraulic fluid, improved performance (the document title) | document title |
| Compounds manufacturers pair with this document | Parker ORD 5700 (2021) Table 8-3 and Table 8-4 pair N0756-75 with MIL-P-83461 and AMS-P-83461 | Parker ORD 5700 (2021) Tables 8-3 and 8-4, read 2026-09-24 |
Status strings are quoted as DLA ASSIST and SAE Mobilus print them (Canceled is ASSIST's spelling; Inactive means inactive for new design; Withdrawn is SAE's word). Conquest Seal is a distributor and is not itself listed on any qualified products list.
Designator to AS568 size
M83461/1-XXX is the AS568-XXX size; the same dash on the AMS-P-83461/1 callout is the same size. The /2 sheet, MIL-P-83461/2, writes the straight-thread boss sizes with the three-digit AS568 dash, M83461/2-9YY: the sheet assigns its dash numbers on the AS568 dash system, so the AS568-903 size is M83461/2-903, the sheet's own example (DLA ASSIST ident 71937, read 2026-10-04). Freudenberg's Aerospace Part and Material Cross-Reference (July 2024) also prints a two-digit form, M83461/2-YY, for the same AS568-9YY size.
| M83461/1 | AS83461/1 | AS568 dash | ID in | W in | ID mm | W mm |
|---|---|---|---|---|---|---|
| M83461/1-006 | AS83461/1-006 | AS568-006 | 0.114 | 0.070 | 2.90 | 1.78 |
| M83461/1-010 | AS83461/1-010 | AS568-010 | 0.239 | 0.070 | 6.07 | 1.78 |
| M83461/1-012 | AS83461/1-012 | AS568-012 | 0.364 | 0.070 | 9.25 | 1.78 |
| M83461/1-112 | AS83461/1-112 | AS568-112 | 0.487 | 0.103 | 12.37 | 2.62 |
| M83461/1-114 | AS83461/1-114 | AS568-114 | 0.612 | 0.103 | 15.54 | 2.62 |
| M83461/1-116 | AS83461/1-116 | AS568-116 | 0.737 | 0.103 | 18.72 | 2.62 |
| M83461/1-210 | AS83461/1-210 | AS568-210 | 0.734 | 0.139 | 18.64 | 3.53 |
| M83461/1-214 | AS83461/1-214 | AS568-214 | 0.984 | 0.139 | 24.99 | 3.53 |
| M83461/1-222 | AS83461/1-222 | AS568-222 | 1.484 | 0.139 | 37.69 | 3.53 |
| M83461/1-325 | AS83461/1-325 | AS568-325 | 1.475 | 0.210 | 37.47 | 5.33 |
Millimeter values are converted from the inch table. The dash is a size lookup and never a material; the same dash on another family on the mil-spec hub is the same size in a different document. Full chart: AS568 size chart.
M83461/1 part numbers with their own page
Each of the 73 part numbers below has its own page: the size in inches and millimeters with tolerances, the document it is procured to, its status and the same size under the other documents. Open a series to find the dash on your print.
M83461/1
M83461/1 part numbers, 0xx series (21)
M83461/1-008, M83461/1-009, M83461/1-010, M83461/1-011, M83461/1-012, M83461/1-013, M83461/1-014, M83461/1-015, M83461/1-016, M83461/1-017, M83461/1-018, M83461/1-019, M83461/1-020, M83461/1-021, M83461/1-022, M83461/1-023, M83461/1-026, M83461/1-027, M83461/1-028, M83461/1-030, M83461/1-033
M83461/1 part numbers, 1xx series (29)
M83461/1-110, M83461/1-113, M83461/1-114, M83461/1-115, M83461/1-116, M83461/1-117, M83461/1-119, M83461/1-120, M83461/1-121, M83461/1-122, M83461/1-123, M83461/1-125, M83461/1-126, M83461/1-127, M83461/1-128, M83461/1-130, M83461/1-131, M83461/1-132, M83461/1-133, M83461/1-134, M83461/1-136, M83461/1-137, M83461/1-138, M83461/1-139, M83461/1-140, M83461/1-141, M83461/1-145, M83461/1-148, M83461/1-155
M83461/1 part numbers, 2xx series (12)
M83461/1-210, M83461/1-213, M83461/1-214, M83461/1-219, M83461/1-221, M83461/1-228, M83461/1-230, M83461/1-232, M83461/1-237, M83461/1-241, M83461/1-259, M83461/1-261
M83461/2
M83461/2 part numbers, boss sizes (AS568-9xx) (11)
M83461/2-902, M83461/2-903, M83461/2-904, M83461/2-905, M83461/2-906, M83461/2-908, M83461/2-910, M83461/2-912, M83461/2-916, M83461/2-918, M83461/2-920
Where the documents stand
MIL-P-83461 was written as the improved-performance successor to MIL-P-25732 for petroleum hydraulic fluid, and MIL-P-25732C Notice 1 (1989) named it for new designs in place of the MS28775 material. DLA ASSIST records MIL-P-83461 inactivated on 1997-12-31 and cancelled on 2003-10-01, superseded by SAE-AMS-P-83461, which SAE had issued on 1998-04-01. The size sheet MIL-P-83461/1 was cancelled the same day in favor of SAE-AMS-P-83461/1, and the drawing now lives as SAE-AS83461/1, at revision C, revised in October 2016 and reaffirmed on 2021-11-08, with the title M83461 O-ring molded from AMS-P-83461 rubber.
So a print that reads M83461/1-214 is quoted against AS83461/1 for the size and AMS-P-83461 for the material. The callout did not change; only the documents behind it moved from DLA to SAE.
The base polymer
The polymer behind this family is nitrile (NBR). The Parker O-Ring Handbook ORD 5700 family range for Buna-N (NBR) (section 2.2, read 2026-09-14) is -34 C to 100 C; that is the polymer family's range, not this document's requirement, and the compound sheet for the qualified grade governs. Parker notes that specification temperature limits do not necessarily represent operating temperature limits.
Material page: Nitrile (NBR) O-rings. Temperature ranges by family: O-ring temperature ranges.
How we quote this family
Send the designator as printed, M83461/1-XXX or AS83461/1-XXX, with the dash, the quantity and the certification the order needs. The quote reads: supplied against AMS-P-83461 and the AS83461/1 drawing, in the nitrile compound the document calls for, with a certificate of conformance and lot traceability. A boss size is the /2 sheet, M83461/2-9XX; a two-digit dash on a maker's cross-reference, M83461/2-XX, names the same AS568-9XX size. Send either the same way. If the print names a compound number, include it.
Related pages
Other families: MS28775, M83248/1 and M83248/2, M83485/1, M25988/1, /2, /3 and /4, MS29513 and MS29512, NAS1611 and NAS1612, AS3582, AS9386 and AS9385, AS3209 and AS3208.
Frequently asked
What is M83461/1 and how does it differ from MS28775?
M83461/1 is the improved-performance petroleum hydraulic nitrile O-ring, made to MIL-P-83461/1 and now to SAE-AMS-P-83461 with SAE-AS83461/1 as the drawing. MS28775 is the older nitrile in the same service under MIL-PRF-25732. Both use the AS568 dash for size, so M83461/1-214 and MS28775-214 are one size in two documents. Quote the one the print names.
Is MIL-P-83461 still active?
No. DLA ASSIST lists MIL-P-83461 as cancelled on 2003-10-01, superseded by SAE-AMS-P-83461, and the size sheet MIL-P-83461/1 cancelled the same day in favor of SAE-AMS-P-83461/1. The current drawing is SAE-AS83461/1C, revised in 2016 and reaffirmed on 2021-11-08. The part number stays on drawings and is still a valid callout.
What does the /2 in M83461/2 mean?
The slash sheet on this family is the size sheet: /1, MIL-P-83461/1, covers the standard AS568 sizes, and /2, MIL-P-83461/2 (30 January 1991), covers the straight-thread tube fitting boss sizes, AS568-901 to -932, written with the same three-digit dash; M83461/2-903 is the sheet's own example. Both are the same nitrile material under MIL-P-83461, now AMS-P-83461. DLA ASSIST records the /2 sheet as canceled on 2003-10-01, with future acquisitions referred to SAE AMS-P-83461/2, whose adoption DoD withdrew on 2010-01-20 for SAE AS83461/2, Active (idents 71937, 213940 and 277054, read 2026-10-04).
What compound is an M83461/1 O-ring?
A nitrile (NBR) compound qualified to AMS-P-83461 (formerly MIL-P-83461). Parker ORD 5700 (2021) pairs its N0756-75 with both documents in its specification tables, in the 70 to 80 hardness band. We quote the part in the compound the document calls for and name the manufacturer on the certification.
Does M83461/1 have a QPL?
Not on record. The cancelled MIL-P-83461 shows no qualified products list on its DLA ASSIST record, and SAE's AMS-P-83461 page does not state one. Manufacturers produce to the document and certify to it; we supply the part with that certificate of conformance.
Related guides
Sources
DLA ASSIST document details, idents 33813 (MIL-P-83461) and 33814 (MIL-P-83461/1), read 2026-09-24, and MIL-P-25732C Notice 1 (1989), read 2026-09-25; SAE Mobilus: AMSP83461 (issued 1998-04-01) and AS83461/1C (revised October 2016, reaffirmed 2021-11-08), read 2026-09-27; Parker O-Ring Handbook ORD 5700 (2021), Tables 8-3 and 8-4, for the compound pairing, read 2026-09-24; Parker O-Ring Handbook ORD 5700, 2021 printing, section IX, AS568 size tables, pages 9-2 to 9-11, read 2026-09-27; DLA ASSIST: MIL-P-83461/2 (ident 71937: the sheet 1991-01-30, Notice 1 1997-12-31, Notice 2 2003-10-01), SAE-AMS-P-83461/2 (ident 213940, Withdrawn 2010-01-20) and SAE-AS83461/2 (ident 277054, Active, adopted 2010-01-20), read 2026-10-04. Facts are stated in our own words and our own arrangement; no standard's text or table and no manufacturer's cross-reference table is reproduced. Compound pairings are the named manufacturer's published statements, not qualified products list entries.
Parker is a trademark of Parker Hannifin Corporation. No affiliation or endorsement is implied.
Setting Conquest Seal up as a supplier?
Orders are handled under Conquest Seal's AS9100D quality management system, whose certificate scope includes distribution.
Need M83461/1 with certification?
Send the designator as the print reads it, the dash, the quantity and the paperwork the order needs. A Conquest representative replies with the part quoted against the document. Quotes answered within one business day. A person answers (714) 632-9830, Pacific business hours.
Request a quoteLast updated